Mattress



April L D CANFIELD MATTRESS Filed Dec. 25, 1931 2 Sheets-Sheet l April 11, 1933. D: CANFlELD 1,903,619

MATTRESS Filed Dec. 23, 1931 2 SheeS-Sheel 2 ipaterntecl Apr.. lli, M33

UNITED STATES iseaaia PATENT OFI-ica LEO ii. CANFIELD, or OIIIcAGo, ILLINOIS, AssIGNOB. To SUPERIOR FELT a BEDDING COMPANY, or CHICAGO. ILLINOIS, A CORPORATION or ILLINOIS MATTRESS Applicationled December 23, 1931. Serial No. 582,819.

box-like or rectangular spring constructionl including a plurality of vertically arranged coil springs. I shall describe the invention embodied in a bed mattress, it being under-l stood, however, that in using the term mattress, I include cushions and similar articles for use on beds, couches, lounges, and other places.

Among the eaturesof my invention is the provision of novel spring construction inside of the mattress, including two separate boxlike springs, one superimposed on the other.

Another feature of my invention is the provision of a separating layer of padding between the two inner springs.

By employing a double layer of springs, I am able to make a relatively deep mattress with extreme resiliency, flexibility and softness without undesirable lateral swaying. By providing two layers of coil springs, I ani able to make each spring relatively shorter and still provide it with relatively wlde or large ends, thus increasing the stability and firmness of the construction without detracting from its resiliency.

It is well known that the convolutions of the ordinary coil spring used in box springs, mattresses, and the like, have a relatively large diameter at the ends small diameter in the middle. The large convolutions have less stiffness than the small ones. The convolutions of smaller diameter are stiffer but do not furnish as much stability and resistance against lateral swaying as the larger ones. There is, therefore, a practical limit to the length of small convo-y lutions that can be employed without permit-- ting objectionable swaying or bending. I By providing a double layer of springs with separate coils, I amable to provide the desired vertical height of small convolutions and still atl'ord the desired stability. By providing two springs instead of one, with a partition between, the adjacent large end coils of the upper and lower springs aid in st'li'ening the mattress and giving it stability without detracting from the desired resiliency.

and relatively By using my invention, it is also possible to employ springs of different stiffness or characteristics in the two layers so as to provide a mattress with dierent degrees of softness on the two sides thereof.

Other features and advantages of my invention will a pear more fully as I proceed with my speci cation.

In those forms of devices embodying the lfeatures of my invention shown in the accompanying drawings- Figure l is a fragmentary view partly in side elevation and partly in vertical section; Fig. 2 is a view taken as indicated by the line 2 of Fig. l; F ig.3 is a view taken as indicated by the line 3 of Fig. 1; Fig. 4 is an enlarged fragmentary view taken as indicated by the line 4 of Fig. 2 but showing a modification in the coil springs employed; and Fig. 5 is a View taken as indicated by the line 5 of Fig.v 1.

As shown in the drawings, the mattress includes an interior double rectangular or boxlike spring construction. I provide virtually two separate and distinct box-like spring constructions, one being superimposed upon the other. In other words, there are provided two layers of springs. The upper spring construction I have indicated, in general, by 10 and the lower by l0, formed by a plurality of vertically arranged coil springs 11 and 11,, respectively. The coils in the two layers may be of the same number and have the same characteristics or there may be a variance between the two. In

the forni shown in Figs. l, 2, 3 and 5, I have Each of these is dicated by Illa. In other respects, however, Y

the construction is the same.

The convolutions of each of the coil springs at theends are relatively greater in diameter than those in the center of the spring. The coils of each layer are held in position by transverse helical connecting wires 12 connected to the end turns of the springs and connecting together the end turns of adjacent springs, as indicated by 12a.

, units.

Between the two layers of springs I provide a flexible sheet member serving as a partition or separating member, here shown as a layer of padding 13,-for example, cottlouor felt, loose or in layer formation, hair, quilted cotton batting, and the like, preferably cov-v ered with suitable fabric 13a. At the margins, this pad is joined to the upper and lower layers of springs by the stitching 14. The padding 13 may be quilted by suitable stitchin 13".

ver the top layer of springs I preferably provide suitable padding 15 on a layer of cloth 16 and sew the same at the margins to the upper layer of-springs by the stitching 17. At the bottom I provide a similar layer of padding 15a with a layer of cloth 16* between it and the springs, said padding being attached to the springs at its margins by the stitching 17 B.

Over the spring construction and upper and lower padding 15 and 15 I provide another layer of padding 18 and enclose the whole in a suitable case or cover 19.

The paddingA 15 may be attached to the sheet 16a by suitable quilting or stitching 16b and the padding 15 similarly attached to the cloth 16, if desired.

While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit `and scope of the invention as disclosed in the a pended claim,'

in which it is my intention to c aim all novelty inherent in my invention as broadly as permissible, in view of the prior art.

The new and original, also improved construction features of my double deck innersprin mattress structure, incorporate the use o two specially designed, low type innerspring units, one superimposed on the other with a iexible sheet member-better termed an insulating and anchoring pad-which is placed between the upper and lower spring The formation of the three (two spring units and pad) into a new, original i f style or type of a double deck innerspring mattress structure is accomplished by tying the three above-mentioned spring units and pad together, with the stitches 14, which are applied to the outside row of uppe'r and lower springs where the innermost end coils of the upper and lower 'spring units rest y against the insulating pad at the outside edges. or margin of the structure. The stitches also pass through the insulating pad, locking it permanently in proper position, eliminating any possibility of shifting.

It is well known that the convolutions of the ordinary hour glass type of coil or spring commonly used in mattresses and the like have a large diameter at the ends and a much smaller diameter in the middle. The large convolutions have less stiffness than the small ones. The convolutions of smaller diameter are stiffer, but do not furnish as much stability and resistance against lateral sway as the large ones. There is, therefore, a practical limit to the length or height of small convolutions which can be employed in a single coil or 'spring without permitting objectionable side sway or bendin when used in innerspring mattress units. lg the use of the double deck arrangement o springs, I am able to provide the much desired increased vertical coil height of the innerspring unit or structure. e

It is to be particularly noted that the padding at the sides ofthe mattress lies in contact with the edges of the insulating pad 13. This serves to confine separate air spaces in the mattress above and below the insulating pad 13. The insulating properties of the mattress are, therefore, very much increased. By providing the two separate dead air spaces, heat radiation is very much lessened.

What I regard as new, and desire to secure by Letters Patent, is:

A reversible mattress, including; a double layer of spiral springs, one superimposed upon the other; a flexible insulating pad between the layers of springs; means attach# ing the periphery of the pad to the lower ing in contact with the edges of the insulating pad to confine separate air spaces both above and below said insulatin pad; and a lcasing outside of the outer pad ing.

In witness whereof, I have hereunto setr day of December, 1931.

my hand this 21st LEO D. CANFIELD. 

